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S40930 Stainless Steel vs. Grade 705C Zirconium

S40930 stainless steel belongs to the iron alloys classification, while grade 705C zirconium belongs to the otherwise unclassified metals. There are 22 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is S40930 stainless steel and the bottom bar is grade 705C zirconium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
200
Elastic (Young's, Tensile) Modulus, GPa 190
98
Elongation at Break, % 23
13
Poisson's Ratio 0.28
0.34
Rockwell B Hardness 76
87
Shear Modulus, GPa 75
36
Tensile Strength: Ultimate (UTS), MPa 430
540
Tensile Strength: Yield (Proof), MPa 190
390

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Specific Heat Capacity, J/kg-K 480
270
Thermal Conductivity, W/m-K 25
18
Thermal Expansion, µm/m-K 10
5.7

Otherwise Unclassified Properties

Density, g/cm3 7.8
6.7
Embodied Water, L/kg 94
450

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 80
66
Resilience: Unit (Modulus of Resilience), kJ/m3 94
790
Stiffness to Weight: Axial, points 14
8.1
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 16
22
Strength to Weight: Bending, points 16
22
Thermal Diffusivity, mm2/s 6.7
9.9
Thermal Shock Resistance, points 16
69

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.1
Chromium (Cr), % 10.5 to 11.7
0
Hafnium (Hf), % 0
0 to 4.5
Hydrogen (H), % 0
0 to 0.0050
Iron (Fe), % 84.7 to 89.4
0 to 0.3
Manganese (Mn), % 0 to 1.0
0
Nickel (Ni), % 0 to 0.5
0
Niobium (Nb), % 0.080 to 0.75
2.0 to 3.0
Nitrogen (N), % 0 to 0.030
0 to 0.030
Oxygen (O), % 0
0 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.010
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.020
0
Titanium (Ti), % 0.050 to 0.2
0
Zirconium (Zr), % 0
91.9 to 98